Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 0
   3 SUBLEVEL = 0
   4 EXTRAVERSION =-rc10
   5 NAME = Amissive Actinocutious Kiwi
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not:
  14 # o  use make's built-in rules and variables
  15 #    (this increases performance and avoid hard-to-debug behavour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into uboot), we will call a sub make in that other dir, and
  27 # after that we are sure that everything which is in that other dir
  28 # is now up to date.
  29 #
  30 # The only cases where we need to modify files which have global
  31 # effects are thus separated out and done before the recursive
  32 # descending is started. They are now explicitly listed as the
  33 # prepare rule.
  34
  35 # To put more focus on warnings, be less verbose as default
  36 # Use 'make V=1' to see the full commands
  37
  38 ifdef V
  39   ifeq ("$(origin V)", "command line")
  40     KBUILD_VERBOSE = $(V)
  41   endif
  42 endif
  43 ifndef KBUILD_VERBOSE
  44   KBUILD_VERBOSE = 0
  45 endif
  46
  47 # Call a source code checker (by default, "sparse") as part of the
  48 # C compilation.
  49 #
  50 # Use 'make C=1' to enable checking of only re-compiled files.
  51 # Use 'make C=2' to enable checking of *all* source files, regardless
  52 # of whether they are re-compiled or not.
  53 #
  54 # See the file "Documentation/sparse.txt" for more details, including
  55 # where to get the "sparse" utility.
  56
  57 ifdef C
  58   ifeq ("$(origin C)", "command line")
  59     KBUILD_CHECKSRC = $(C)
  60   endif
  61 endif
  62 ifndef KBUILD_CHECKSRC
  63   KBUILD_CHECKSRC = 0
  64 endif
  65
  66 # Use make M=dir to specify directory of external module to build
  67 # Old syntax make ... SUBDIRS=$PWD is still supported
  68 # Setting the environment variable KBUILD_EXTMOD take precedence
  69 ifdef SUBDIRS
  70   KBUILD_EXTMOD ?= $(SUBDIRS)
  71 endif
  72 ifdef M
  73   ifeq ("$(origin M)", "command line")
  74     KBUILD_EXTMOD := $(M)
  75   endif
  76 endif
  77
  78
  79 # kbuild supports saving output files in a separate directory.
  80 # To locate output files in a separate directory two syntaxes are supported.
  81 # In both cases the working directory must be the root of the kernel src.
  82 # 1) O=
  83 # Use "make O=dir/to/store/output/files/"
  84 #
  85 # 2) Set KBUILD_OUTPUT
  86 # Set the environment variable KBUILD_OUTPUT to point to the directory
  87 # where the output files shall be placed.
  88 # export KBUILD_OUTPUT=dir/to/store/output/files/
  89 # make
  90 #
  91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  92 # variable.
  93
  94
  95 # KBUILD_SRC is set on invocation of make in OBJ directory
  96 # KBUILD_SRC is not intended to be used by the regular user (for now)
  97 ifeq ($(KBUILD_SRC),)
  98
  99 # OK, Make called in directory where kernel src resides
 100 # Do we want to locate output files in a separate directory?
 101 ifdef O
 102   ifeq ("$(origin O)", "command line")
 103     KBUILD_OUTPUT := $(O)
 104   endif
 105 endif
 106
 107 # That's our default target when none is given on the command line
 108 PHONY := _all
 109 _all:
 110
 111 ifneq ($(KBUILD_OUTPUT),)
 112 # Invoke a second make in the output directory, passing relevant variables
 113 # check that the output directory actually exists
 114 saved-output := $(KBUILD_OUTPUT)
 115 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 116 $(if $(KBUILD_OUTPUT),, \
 117      $(error output directory "$(saved-output)" does not exist))
 118
 119 PHONY += $(MAKECMDGOALS)
 120
 121 $(filter-out _all,$(MAKECMDGOALS)) _all:
 122         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 123         KBUILD_SRC=$(CURDIR) \
 124         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 125
 126 # Leave processing to above invocation of make
 127 skip-makefile := 1
 128 endif # ifneq ($(KBUILD_OUTPUT),)
 129 endif # ifeq ($(KBUILD_SRC),)
 130
 131 # We process the rest of the Makefile if this is the final invocation of make
 132 ifeq ($(skip-makefile),)
 133
 134 # If building an external module we do not care about the all: rule
 135 # but instead _all depend on modules
 136 PHONY += all
 137 _all: all
 138
 139 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 140 objtree         := $(CURDIR)
 141 src             := $(srctree)
 142 obj             := $(objtree)
 143
 144 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 145
 146 export srctree objtree VPATH
 147
 148 # Cross compiling and selecting different set of gcc/bin-utils
 149 # ---------------------------------------------------------------------------
 150 #
 151 # When performing cross compilation for other architectures ARCH shall be set
 152 # to the target architecture. (See arch/* for the possibilities).
 153 # ARCH can be set during invocation of make:
 154 # make ARCH=ia64
 155 # Another way is to have ARCH set in the environment.
 156 # The default ARCH is the host where make is executed.
 157
 158 # CROSS_COMPILE specify the prefix used for all executables used
 159 # during compilation. Only gcc and related bin-utils executables
 160 # are prefixed with $(CROSS_COMPILE).
 161 # CROSS_COMPILE can be set on the command line
 162 # make CROSS_COMPILE=ia64-linux-
 163 # Alternatively CROSS_COMPILE can be set in the environment.
 164 # Default value for CROSS_COMPILE is not to prefix executables
 165
 166 ARCH            ?= sandbox
 167 CROSS_COMPILE   ?=
 168
 169 # Architecture as present in compile.h
 170 UTS_MACHINE := $(ARCH)
 171 SRCARCH         := $(ARCH)
 172
 173 KCONFIG_CONFIG  ?= .config
 174
 175 # SHELL used by kbuild
 176 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 177           else if [ -x /bin/bash ]; then echo /bin/bash; \
 178           else echo sh; fi ; fi)
 179
 180 HOSTCC       = gcc
 181 HOSTCXX      = g++
 182 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 183 HOSTCXXFLAGS = -O2
 184
 185 # Decide whether to build built-in, modular, or both.
 186 # Normally, just do built-in.
 187
 188 KBUILD_MODULES :=
 189 KBUILD_BUILTIN := 1
 190
 191 #       If we have only "make modules", don't compile built-in objects.
 192 #       When we're building modules with modversions, we need to consider
 193 #       the built-in objects during the descend as well, in order to
 194 #       make sure the checksums are up to date before we record them.
 195
 196 ifeq ($(MAKECMDGOALS),modules)
 197   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 198 endif
 199
 200 #       If we have "make <whatever> modules", compile modules
 201 #       in addition to whatever we do anyway.
 202 #       Just "make" or "make all" shall build modules as well
 203
 204 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 205   KBUILD_MODULES := 1
 206 endif
 207
 208 export KBUILD_MODULES KBUILD_BUILTIN
 209 export KBUILD_CHECKSRC KBUILD_SRC
 210
 211 # Beautify output
 212 # ---------------------------------------------------------------------------
 213 #
 214 # Normally, we echo the whole command before executing it. By making
 215 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 216 # $(quiet) to choose other forms of output instead, e.g.
 217 #
 218 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 219 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 220 #
 221 # If $(quiet) is empty, the whole command will be printed.
 222 # If it is set to "quiet_", only the short version will be printed.
 223 # If it is set to "silent_", nothing will be printed at all, since
 224 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 225 #
 226 # A simple variant is to prefix commands with $(Q) - that's useful
 227 # for commands that shall be hidden in non-verbose mode.
 228 #
 229 #       $(Q)ln $@ :<
 230 #
 231 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 232 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 233
 234 ifeq ($(KBUILD_VERBOSE),1)
 235   quiet =
 236   Q =
 237 else
 238   quiet=quiet_
 239   Q = @
 240 endif
 241
 242 # If the user is running make -s (silent mode), suppress echoing of
 243 # commands
 244
 245 ifneq ($(findstring s,$(MAKEFLAGS)),)
 246   quiet=silent_
 247 endif
 248
 249 export quiet Q KBUILD_VERBOSE
 250
 251
 252 # Look for make include files relative to root of kernel src
 253 MAKEFLAGS += --include-dir=$(srctree)
 254
 255 # We need some generic definitions.
 256 include $(srctree)/scripts/Kbuild.include
 257
 258 # Make variables (CC, etc...)
 259
 260 AS              = $(CROSS_COMPILE)as
 261 LD              = $(CROSS_COMPILE)ld
 262 CC              = $(CROSS_COMPILE)gcc
 263 CPP             = $(CC) -E
 264 AR              = $(CROSS_COMPILE)ar
 265 NM              = $(CROSS_COMPILE)nm
 266 STRIP           = $(CROSS_COMPILE)strip
 267 OBJCOPY         = $(CROSS_COMPILE)objcopy
 268 OBJDUMP         = $(CROSS_COMPILE)objdump
 269 AWK             = awk
 270 GENKSYMS        = scripts/genksyms/genksyms
 271 DEPMOD          = /sbin/depmod
 272 KALLSYMS        = scripts/kallsyms
 273 PERL            = perl
 274 CHECK           = sparse
 275
 276 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 277 CFLAGS_KERNEL   =
 278 AFLAGS_KERNEL   =
 279
 280 LDFLAGS_MODULE  = -T common/module.lds
 281
 282 # When compiling out-of-tree modules, put MODVERDIR in the module
 283 # tree rather than in the kernel tree. The kernel tree might
 284 # even be read-only.
 285 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 286
 287 # Use LINUXINCLUDE when you must reference the include/ directory.
 288 # Needed to be compatible with the O= option
 289 LINUXINCLUDE    := -Iinclude \
 290                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 291                    -include include/linux/autoconf.h
 292
 293 CPPFLAGS        := -D__KERNEL__ -D__U_BOOT__ $(LINUXINCLUDE) -fno-builtin -ffreestanding
 294
 295 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 296                    -fno-strict-aliasing -fno-common -Os -pipe
 297 AFLAGS          := -D__ASSEMBLY__
 298
 299 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 300 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 301 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 302
 303 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 304 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 305 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 306 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 307
 308 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 309 export CFLAGS CFLAGS_KERNEL
 310 export AFLAGS AFLAGS_KERNEL
 311
 312 # Files to ignore in find ... statements
 313
 314 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 315 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 316
 317 # ===========================================================================
 318 # Rules shared between *config targets and build targets
 319
 320 # Basic helpers built in scripts/
 321 PHONY += scripts_basic
 322 scripts_basic:
 323         $(Q)$(MAKE) $(build)=scripts/basic
 324
 325 # To avoid any implicit rule to kick in, define an empty command.
 326 scripts/basic/%: scripts_basic ;
 327
 328 PHONY += outputmakefile
 329 # outputmakefile generates a Makefile in the output directory, if using a
 330 # separate output directory. This allows convenient use of make in the
 331 # output directory.
 332 outputmakefile:
 333 ifneq ($(KBUILD_SRC),)
 334         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 335             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 336 endif
 337
 338 # To make sure we do not include .config for any of the *config targets
 339 # catch them early, and hand them over to scripts/kconfig/Makefile
 340 # It is allowed to specify more targets when calling make, including
 341 # mixing *config targets and build targets.
 342 # For example 'make oldconfig all'.
 343 # Detect when mixed targets is specified, and make a second invocation
 344 # of make so .config is not included in this case either (for *config).
 345
 346 no-dot-config-targets := clean mrproper distclean \
 347                          cscope TAGS tags help %docs check% \
 348                          include/linux/version.h headers_% \
 349                          kernelrelease kernelversion
 350
 351 config-targets := 0
 352 mixed-targets  := 0
 353 dot-config     := 1
 354
 355 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 356         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 357                 dot-config := 0
 358         endif
 359 endif
 360
 361 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 362         config-targets := 1
 363         ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 364                 mixed-targets := 1
 365         endif
 366 endif
 367
 368 ifeq ($(mixed-targets),1)
 369 # ===========================================================================
 370 # We're called with mixed targets (*config and build targets).
 371 # Handle them one by one.
 372
 373 %:: FORCE
 374         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 375
 376 else
 377 ifeq ($(config-targets),1)
 378 # ===========================================================================
 379 # *config targets only - make sure prerequisites are updated, and descend
 380 # in scripts/kconfig to make the *config target
 381
 382 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 383 # KBUILD_DEFCONFIG may point out an alternative default configuration
 384 # used for 'make defconfig'
 385 include $(srctree)/arch/$(ARCH)/Makefile
 386 export KBUILD_DEFCONFIG
 387
 388 config %config: scripts_basic outputmakefile FORCE
 389         $(Q)mkdir -p include/linux include/config
 390         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 391
 392 else
 393 # ===========================================================================
 394 # Build targets only - this includes uboot, arch specific targets, clean
 395 # targets and others. In general all targets except *config targets.
 396
 397 # Additional helpers built in scripts/
 398 # Carefully list dependencies so we do not try to build scripts twice
 399 # in parallel
 400 PHONY += scripts
 401 scripts: scripts_basic include/config/auto.conf
 402         $(Q)$(MAKE) $(build)=$(@)
 403
 404 # Objects we will link into uboot / subdirs we need to visit
 405 common-y                := common/ drivers/ commands/ lib/ net/ fs/
 406
 407 ifeq ($(dot-config),1)
 408 # Read in config
 409 -include include/config/auto.conf
 410
 411 # Read in dependencies to all Kconfig* files, make sure to run
 412 # oldconfig if changes are detected.
 413 -include include/config/auto.conf.cmd
 414
 415 # To avoid any implicit rule to kick in, define an empty command
 416 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 417
 418 # If .config is newer than include/config/auto.conf, someone tinkered
 419 # with it and forgot to run make oldconfig.
 420 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 421 # we execute the config step to be sure to catch updated Kconfig files
 422 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 423         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 424
 425 else
 426 # Dummy target needed, because used as prerequisite
 427 include/config/auto.conf: ;
 428 endif # $(dot-config)
 429
 430 # The all: target is the default when no target is given on the
 431 # command line.
 432 # This allow a user to issue only 'make' to build a kernel
 433 # Defaults uboot but it is usually overridden in the arch makefile
 434 all: uboot.bin
 435
 436 include $(srctree)/arch/$(ARCH)/Makefile
 437
 438 ifdef CONFIG_DEBUG_INFO
 439 CFLAGS          += -g
 440 endif
 441
 442 # Force gcc to behave correct even for buggy distributions
 443 CFLAGS          += $(call cc-option, -fno-stack-protector)
 444
 445 # arch Makefile may override CC so keep this after arch Makefile is included
 446 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 447 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 448
 449 # warn about C99 declaration after statement
 450 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 451
 452 # disable pointer signed / unsigned warnings in gcc 4.0
 453 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 454
 455 # Default kernel image to build when no specific target is given.
 456 # KBUILD_IMAGE may be overruled on the command line or
 457 # set in the environment
 458 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 459 # this default value
 460 export KBUILD_IMAGE ?= uboot
 461
 462 uboot-dirs      := $(patsubst %/,%,$(filter %/, $(common-y)))
 463
 464 uboot-alldirs   := $(sort $(uboot-dirs) $(patsubst %/,%,$(filter %/, \
 465                      $(common-n) $(common-) \
 466                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 467                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 468
 469 common-y        := $(patsubst %/, %/built-in.o, $(common-y))
 470
 471 # Build uboot
 472 # ---------------------------------------------------------------------------
 473 # uboot is built from the objects selected by $(uboot-init) and
 474 # $(uboot-main). Most are built-in.o files from top-level directories
 475 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 476 # Ordering when linking is important, and $(uboot-init) must be first.
 477 #
 478 # FIXME: This picture is wrong for U-Boot. We have no init, driver, mm
 479 #
 480 # uboot
 481 #   ^
 482 #   |
 483 #   +-< $(uboot-init)
 484 #   |   +--< init/version.o + more
 485 #   |
 486 #   +--< $(uboot-main)
 487 #   |    +--< driver/built-in.o mm/built-in.o + more
 488 #   |
 489 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 490 #
 491 # uboot version cannot be updated during normal
 492 # descending-into-subdirs phase since we do not yet know if we need to
 493 # update uboot.
 494 #
 495 # System.map is generated to document addresses of all kernel symbols
 496
 497 uboot-common := $(common-y)
 498 uboot-all    := $(uboot-common)
 499 uboot-lds    := $(lds-y)
 500
 501 # Rule to link uboot
 502 # May be overridden by arch/$(ARCH)/Makefile
 503 quiet_cmd_uboot__ ?= LD      $@
 504       cmd_uboot__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_uboot) -o $@ \
 505       -T $(uboot-lds) $(uboot-head)                         \
 506       --start-group $(uboot-common) --end-group                  \
 507       $(filter-out $(uboot-lds) $(uboot-common) FORCE ,$^)
 508
 509 # Generate new uboot version
 510 quiet_cmd_uboot_version = GEN     .version
 511       cmd_uboot_version = set -e;                     \
 512         if [ ! -r .version ]; then                      \
 513           rm -f .version;                               \
 514           echo 1 >.version;                             \
 515         else                                            \
 516           mv .version .old_version;                     \
 517           expr 0$$(cat .old_version) + 1 >.version;     \
 518         fi;                                             \
 519
 520
 521 # Generate System.map
 522 quiet_cmd_sysmap = SYSMAP
 523       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 524
 525 # Link of uboot
 526 # Generate System.map and verify that the content is consistent
 527 # Use + in front of the uboot_version rule to silent warning with make -j2
 528 # First command is ':' to allow us to use + in front of the rule
 529 define rule_uboot__
 530         :
 531
 532         $(call cmd,uboot__)
 533
 534         $(Q)echo 'cmd_$@ := $(cmd_uboot__)' > $(@D)/.$(@F).cmd
 535
 536         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 537           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 538         $(cmd_sysmap) $@ System.map;                                         \
 539         if [ $$? -ne 0 ]; then                                               \
 540                 rm -f $@;                                                    \
 541                 /bin/false;                                                  \
 542         fi;
 543 endef
 544
 545 ifdef CONFIG_KALLSYMS
 546 # Generate section listing all symbols and add it into uboot $(kallsyms.o)
 547 # It's a three stage process:
 548 # o .tmp_uboot1 has all symbols and sections, but __kallsyms is
 549 #   empty
 550 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 551 #   the right size - uboot version is updated during this step
 552 # o .tmp_uboot2 now has a __kallsyms section of the right size,
 553 #   but due to the added section, some addresses have shifted.
 554 #   From here, we generate a correct .tmp_kallsyms2.o
 555 # o The correct .tmp_kallsyms2.o is linked into the final uboot.
 556 # o Verify that the System.map from uboot matches the map from
 557 #   .tmp_uboot2, just in case we did not generate kallsyms correctly.
 558 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 559 #   .tmp_uboot3 and .tmp_kallsyms3.o.  This is only meant as a
 560 #   temporary bypass to allow the kernel to be built while the
 561 #   maintainers work out what went wrong with kallsyms.
 562
 563 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 564 last_kallsyms := 3
 565 else
 566 last_kallsyms := 2
 567 endif
 568
 569 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 570
 571 define verify_kallsyms
 572         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 573           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 574           $(cmd_sysmap) .tmp_uboot$(last_kallsyms) .tmp_System.map
 575         $(Q)cmp -s System.map .tmp_System.map ||                             \
 576                 (echo Inconsistent kallsyms data;                            \
 577                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 578                  rm .tmp_kallsyms* ; /bin/false )
 579 endef
 580
 581 # Update uboot version before link
 582 # Use + in front of this rule to silent warning about make -j1
 583 # First command is ':' to allow us to use + in front of this rule
 584 cmd_ksym_ld = $(cmd_uboot__)
 585 define rule_ksym_ld
 586         :
 587         +$(call cmd,uboot_version)
 588         $(call cmd,uboot__)
 589         $(Q)echo 'cmd_$@ := $(cmd_uboot__)' > $(@D)/.$(@F).cmd
 590 endef
 591
 592 # Generate .S file with all kernel symbols
 593 quiet_cmd_kallsyms = KSYM    $@
 594       cmd_kallsyms = $(NM) -g -n $< | $(KALLSYMS) > $@
 595
 596 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 597         $(call if_changed_dep,as_o_S)
 598
 599 .tmp_kallsyms%.S: .tmp_uboot% $(KALLSYMS)
 600         $(call cmd,kallsyms)
 601
 602 # .tmp_uboot1 must be complete except kallsyms, so update uboot version
 603 .tmp_uboot1: $(uboot-lds) $(uboot-all) FORCE
 604         $(call if_changed_rule,ksym_ld)
 605
 606 .tmp_uboot2: $(uboot-lds) $(uboot-all) .tmp_kallsyms1.o FORCE
 607         $(call if_changed,uboot__)
 608
 609 .tmp_uboot3: $(uboot-lds) $(uboot-all) .tmp_kallsyms2.o FORCE
 610         $(call if_changed,uboot__)
 611
 612 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 613 $(KALLSYMS): scripts ;
 614
 615 # Generate some data for debugging strange kallsyms problems
 616 debug_kallsyms: .tmp_map$(last_kallsyms)
 617
 618 .tmp_map%: .tmp_uboot% FORCE
 619         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 620
 621 .tmp_map3: .tmp_map2
 622
 623 .tmp_map2: .tmp_map1
 624
 625 endif # ifdef CONFIG_KALLSYMS
 626
 627 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 628 # relevant sections renamed as per the linker script.
 629 quiet_cmd_uboot-modpost = LD      $@
 630       cmd_uboot-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 631          $(vmlinux-init) --start-group $(uboot-main) --end-group             \
 632          $(filter-out $(uboot-init) $(uboot-main) $(uboot-lds) FORCE ,$^)
 633 define rule_uboot-modpost
 634         :
 635         +$(call cmd,uboot-modpost)
 636         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 637         $(Q)echo 'cmd_$@ := $(cmd_uboot-modpost)' > $(dot-target).cmd
 638 endef
 639
 640 uboot.bin: uboot
 641         $(Q)$(OBJCOPY) -O binary uboot uboot.bin
 642         $(Q)$(OBJDUMP) -d uboot > uboot.S
 643
 644 # uboot image
 645 uboot: $(uboot-lds) $(uboot-head) $(uboot-common) $(kallsyms.o) FORCE
 646         $(call uboot-modpost)
 647         $(call if_changed_rule,uboot__)
 648         $(Q)rm -f .old_version
 649
 650 # The actual objects are generated when descending,
 651 # make sure no implicit rule kicks in
 652 $(sort $(uboot-head) $(uboot-common) ) $(uboot-lds): $(uboot-dirs) ;
 653
 654 # Handle descending into subdirectories listed in $(uboot-dirs)
 655 # Preset locale variables to speed up the build process. Limit locale
 656 # tweaks to this spot to avoid wrong language settings when running
 657 # make menuconfig etc.
 658 # Error messages still appears in the original language
 659
 660 PHONY += $(uboot-dirs)
 661 $(uboot-dirs): prepare scripts
 662         $(Q)$(MAKE) $(build)=$@
 663
 664 # Build the kernel release string
 665 #
 666 # The KERNELRELEASE value built here is stored in the file
 667 # include/config/kernel.release, and is used when executing several
 668 # make targets, such as "make install" or "make modules_install."
 669 #
 670 # The eventual kernel release string consists of the following fields,
 671 # shown in a hierarchical format to show how smaller parts are concatenated
 672 # to form the larger and final value, with values coming from places like
 673 # the Makefile, kernel config options, make command line options and/or
 674 # SCM tag information.
 675 #
 676 #       $(KERNELVERSION)
 677 #         $(VERSION)                    eg, 2
 678 #         $(PATCHLEVEL)                 eg, 6
 679 #         $(SUBLEVEL)                   eg, 18
 680 #         $(EXTRAVERSION)               eg, -rc6
 681 #       $(localver-full)
 682 #         $(localver)
 683 #           localversion*               (all localversion* files)
 684 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 685 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 686 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 687 #           $(LOCALVERSION)             (from make command line if provided)
 688 #
 689 #  Note how the final $(localver-auto) string is included *only* if the
 690 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 691 # moment, only git is supported but other SCMs can edit the script
 692 # scripts/setlocalversion and add the appropriate checks as needed.
 693
 694 nullstring :=
 695 space      := $(nullstring) # end of line
 696
 697 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 698 __localver  = $(sort $(wildcard $(___localver)))
 699 # skip backup files (containing '~')
 700 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 701
 702 localver = $(subst $(space),, \
 703            $(shell cat /dev/null $(_localver)) \
 704            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 705
 706 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 707 # and if the SCM is know a tag from the SCM is appended.
 708 # The appended tag is determined by the SCM used.
 709 #
 710 # Currently, only git is supported.
 711 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 712 # checks as needed.
 713 ifdef CONFIG_LOCALVERSION_AUTO
 714         _localver-auto = $(shell $(CONFIG_SHELL) \
 715                           $(srctree)/scripts/setlocalversion $(srctree))
 716         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 717 endif
 718
 719 localver-full = $(localver)$(localver-auto)
 720
 721 # Store (new) KERNELRELASE string in include/config/kernel.release
 722 kernelrelease = $(KERNELVERSION)$(localver-full)
 723 include/config/kernel.release: include/config/auto.conf FORCE
 724         $(Q)rm -f $@
 725         $(Q)echo $(kernelrelease) > $@
 726
 727
 728 # Things we need to do before we recursively start building the kernel
 729 # or the modules are listed in "prepare".
 730 # A multi level approach is used. prepareN is processed before prepareN-1.
 731 # archprepare is used in arch Makefiles and when processed asm symlink,
 732 # version.h and scripts_basic is processed / created.
 733
 734 # Listed in dependency order
 735 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 736
 737 # prepare-all is deprecated, use prepare as valid replacement
 738 PHONY += prepare-all
 739
 740 # prepare3 is used to check if we are building in a separate output directory,
 741 # and if so do:
 742 # 1) Check that make has not been executed in the kernel src $(srctree)
 743 # 2) Create the include2 directory, used for the second asm symlink
 744 prepare3: include/config/kernel.release
 745 ifneq ($(KBUILD_SRC),)
 746         @echo '  Using $(srctree) as source for kernel'
 747         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 748                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 749                 echo "  in the '$(srctree)' directory.";\
 750                 /bin/false; \
 751         fi;
 752         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 753         $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/u-boot.h ]; then  \
 754             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 755             fi
 756 endif
 757
 758 # prepare2 creates a makefile if using a separate output directory
 759 prepare2: prepare3 outputmakefile
 760
 761 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 762                    include/asm include/config.h include/config/auto.conf
 763
 764 ifneq ($(KBUILD_MODULES),)
 765         $(Q)mkdir -p $(MODVERDIR)
 766         $(Q)rm -f $(MODVERDIR)/*
 767 endif
 768
 769 archprepare: prepare1 scripts_basic
 770
 771 prepare0: archprepare FORCE
 772         $(Q)$(MAKE) $(build)=.
 773
 774 # All the preparing..
 775 prepare prepare-all: prepare0
 776
 777 # Leave this as default for preprocessing uboot.lds.S, which is now
 778 # done in arch/$(ARCH)/kernel/Makefile
 779
 780 export CPPFLAGS_uboot.lds += -P -C -U$(ARCH)
 781
 782 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 783 # hard to detect, but I suppose "make mrproper" is a good idea
 784 # before switching between archs anyway.
 785
 786 define check-symlink
 787         set -e;                                                         \
 788         if [ -L include/asm ]; then                                     \
 789                 asmlink=`readlink include/asm | cut -d '-' -f 2`;       \
 790                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
 791                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected";   \
 792                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";               \
 793                         exit 1;                                         \
 794                 fi;                                                     \
 795         fi
 796 endef
 797
 798 # We create the target directory of the symlink if it does
 799 # not exist so the test in chack-symlink works and we have a
 800 # directory for generated filesas used by some architectures.
 801 define create-symlink
 802         if [ ! -L include/asm ]; then                                   \
 803                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';  \
 804                         if [ ! -d include/asm-$(SRCARCH) ]; then        \
 805                                 mkdir -p include/asm-$(SRCARCH);        \
 806                         fi;                                             \
 807                         ln -fsn asm-$(SRCARCH) $@;                      \
 808         fi
 809 endef
 810
 811 include/asm:
 812         $(Q)$(check-symlink)
 813         $(Q)$(create-symlink)
 814
 815 include/config.h: include/config/auto.conf
 816         @echo '  SYMLINK $@ -> board/$(board-y)/config.h'
 817 ifneq ($(KBUILD_SRC),)
 818         $(Q)ln -fsn $(srctree)/board/$(board-y)/config.h $@
 819 else
 820         @ln -fsn ../board/$(board-y)/config.h $@
 821 endif
 822
 823 # Generate some files
 824 # ---------------------------------------------------------------------------
 825
 826 # KERNELRELEASE can change from a few different places, meaning version.h
 827 # needs to be updated, so this check is forced on all builds
 828
 829 uts_len := 64
 830 define filechk_utsrelease.h
 831         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 832           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 833           exit 1;                                                         \
 834         fi;                                                               \
 835         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 836 endef
 837
 838 define filechk_version.h
 839         (echo \#define LINUX_VERSION_CODE $(shell                             \
 840         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 841         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 842 endef
 843
 844 include/linux/version.h: $(srctree)/Makefile FORCE
 845         $(call filechk,version.h)
 846
 847 include/linux/utsrelease.h: include/config/kernel.release FORCE
 848         $(call filechk,utsrelease.h)
 849
 850 # ---------------------------------------------------------------------------
 851
 852 PHONY += depend dep
 853 depend dep:
 854         @echo '*** Warning: make $@ is unnecessary now.'
 855
 856 # ---------------------------------------------------------------------------
 857 # Modules
 858
 859 ifdef CONFIG_MODULES
 860
 861 # By default, build modules as well
 862
 863 all: modules
 864
 865 #       Build modules
 866
 867 PHONY += modules
 868 modules: $(uboot-dirs) $(if $(KBUILD_BUILTIN),uboot)
 869         @echo '  Building modules, stage 2.';
 870         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 871
 872
 873 # Target to prepare building external modules
 874 PHONY += modules_prepare
 875 modules_prepare: prepare scripts
 876
 877 # Target to install modules
 878 PHONY += modules_install
 879 modules_install: _modinst_ _modinst_post
 880
 881 PHONY += _modinst_
 882 _modinst_:
 883         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 884                 echo "Warning: you may need to install module-init-tools"; \
 885                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 886                 sleep 1; \
 887         fi
 888         @rm -rf $(MODLIB)/kernel
 889         @rm -f $(MODLIB)/source
 890         @mkdir -p $(MODLIB)/kernel
 891         @ln -s $(srctree) $(MODLIB)/source
 892         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 893                 rm -f $(MODLIB)/build ; \
 894                 ln -s $(objtree) $(MODLIB)/build ; \
 895         fi
 896         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 897
 898 # If System.map exists, run depmod.  This deliberately does not have a
 899 # dependency on System.map since that would run the dependency tree on
 900 # vmlinux.  This depmod is only for convenience to give the initial
 901 # boot a modules.dep even before / is mounted read-write.  However the
 902 # boot script depmod is the master version.
 903 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 904 depmod_opts     :=
 905 else
 906 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 907 endif
 908 PHONY += _modinst_post
 909 _modinst_post: _modinst_
 910         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 911
 912 else # CONFIG_MODULES
 913
 914 # Modules not configured
 915 # ---------------------------------------------------------------------------
 916
 917 modules modules_install: FORCE
 918         @echo
 919         @echo "The present kernel configuration has modules disabled."
 920         @echo "Type 'make config' and enable loadable module support."
 921         @echo "Then build a kernel with module support enabled."
 922         @echo
 923         @exit 1
 924
 925 endif # CONFIG_MODULES
 926
 927 ###
 928 # Cleaning is done on three levels.
 929 # make clean     Delete most generated files
 930 #                Leave enough to build external modules
 931 # make mrproper  Delete the current configuration, and all generated files
 932 # make distclean Remove editor backup files, patch leftover files and the like
 933
 934 # Directories & files removed with 'make clean'
 935 CLEAN_DIRS  += $(MODVERDIR)
 936 CLEAN_FILES +=  uboot System.map include/uboot_default_env.h \
 937                 .tmp_version .tmp_uboot* uboot.bin uboot.S \
 938                 .tmp_kallsyms* uboot_default_env
 939
 940 # Directories & files removed with 'make mrproper'
 941 MRPROPER_DIRS  += include/config include2 usr/include
 942 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
 943                   include/linux/autoconf.h include/linux/version.h      \
 944                   include/linux/utsrelease.h include/config.h           \
 945                   Module.symvers tags TAGS cscope*
 946
 947 # clean - Delete most, but leave enough to build external modules
 948 #
 949 clean: rm-dirs  := $(CLEAN_DIRS)
 950 clean: rm-files := $(CLEAN_FILES)
 951 clean-dirs      := $(addprefix _clean_,$(srctree) $(uboot-alldirs))
 952
 953 PHONY += $(clean-dirs) clean archclean
 954 $(clean-dirs):
 955         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 956
 957 clean: archclean $(clean-dirs)
 958         $(call cmd,rmdirs)
 959         $(call cmd,rmfiles)
 960         @find . $(RCS_FIND_IGNORE) \
 961                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 962                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
 963                 -o -name '*.symtypes' \) \
 964                 -type f -print | xargs rm -f
 965
 966 # mrproper - Delete all generated files, including .config
 967 #
 968 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
 969 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
 970 mrproper-dirs      := $(addprefix _mrproper_,scripts)
 971
 972 PHONY += $(mrproper-dirs) mrproper archmrproper
 973 $(mrproper-dirs):
 974         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 975
 976 mrproper: clean archmrproper $(mrproper-dirs)
 977         $(call cmd,rmdirs)
 978         $(call cmd,rmfiles)
 979
 980 # distclean
 981 #
 982 PHONY += distclean
 983
 984 distclean: mrproper
 985         @find $(srctree) $(RCS_FIND_IGNORE) \
 986                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 987                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 988                 -o -name '.*.rej' -o -size 0 \
 989                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 990                 -type f -print | xargs rm -f
 991
 992
 993 # Packaging of the kernel to various formats
 994 # ---------------------------------------------------------------------------
 995 # rpm target kept for backward compatibility
 996 package-dir     := $(srctree)/scripts/package
 997
 998 %pkg: include/config/kernel.release FORCE
 999         $(Q)$(MAKE) $(build)=$(package-dir) $@
1000 rpm: include/config/kernel.release FORCE
1001         $(Q)$(MAKE) $(build)=$(package-dir) $@
1002
1003
1004 # Brief documentation of the typical targets used
1005 # ---------------------------------------------------------------------------
1006
1007 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1008 boards := $(notdir $(boards))
1009
1010 help:
1011         @echo  'Cleaning targets:'
1012         @echo  '  clean           - Remove most generated files but keep the config and'
1013         @echo  '                    enough build support to build external modules'
1014         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1015         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1016         @echo  '  docs            - start doxygen for all output types (only HTML - FIXME)'
1017         @echo  '    htmldocs      - create documentation in HTML format'
1018         @echo  ''
1019         @echo  'Configuration targets:'
1020         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1021         @echo  ''
1022         @echo  'Other generic targets:'
1023         @echo  '  all             - Build all targets marked with [*]'
1024         @echo  '* uboot           - Build the bare kernel'
1025         @echo  '  dir/            - Build all files in dir and below'
1026         @echo  '  dir/file.[ois]  - Build specified target only'
1027         @echo  '  dir/file.ko     - Build module including final link'
1028         @echo  '  tags/TAGS       - Generate tags file for editors'
1029         @echo  '  cscope          - Generate cscope index'
1030         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1031         @echo  ''
1032         @echo  'Static analysers'
1033         @echo  '  checkstack      - Generate a list of stack hogs'
1034         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1035         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1036          echo  '  headers_check   - Sanity check on exported headers'; \
1037          fi
1038         @echo  ''
1039         @echo  'Architecture specific targets ($(ARCH)):'
1040         @$(if $(archhelp),$(archhelp),\
1041                 echo '  No architecture specific help defined for $(ARCH)')
1042         @echo  ''
1043         @$(if $(boards), \
1044                 $(foreach b, $(boards), \
1045                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1046                 echo '')
1047
1048         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1049         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1050         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1051         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1052         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1053         @echo  ''
1054         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1055         @echo  'For further info see the ./README file'
1056
1057 # Generate doxygen docs
1058 # ---------------------------------------------------------------------------
1059 .PHONY += docs htmldocs
1060
1061 docs : htmldocs
1062
1063 htmldocs:
1064         @echo  'Running doxygen with local Doxyfile'
1065         $(Q)doxygen Doxyfile
1066
1067 # Generate tags for editors
1068 # ---------------------------------------------------------------------------
1069
1070 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1071 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1072 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1073
1074 ifeq ($(src),$(obj))
1075 __srctree =
1076 else
1077 __srctree = $(srctree)/
1078 endif
1079
1080 ifeq ($(ALLSOURCE_ARCHS),)
1081 ifeq ($(ARCH),um)
1082 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1083 else
1084 ALLINCLUDE_ARCHS := $(ARCH)
1085 endif
1086 else
1087 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1088 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1089 endif
1090
1091 ALLSOURCE_ARCHS := $(ARCH)
1092
1093 define find-sources
1094         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1095                \( -name include -o -name arch \) -prune -o \
1096                -name $1 -print; \
1097           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1098                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1099                     -name $1 -print; \
1100           done ; \
1101           find $(__srctree)include $(RCS_FIND_IGNORE) \
1102                \( -name config -o -name 'asm-*' \) -prune \
1103                -o -name $1 -print; \
1104           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1105                test -e $(__srctree)include/asm-$${arch} && \
1106                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1107                    -name $1 -print; \
1108               test -e $(__srctree)arch/$${arch}/include/asm && \
1109                 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1110                     -name $1 -print; \
1111           done ; \
1112           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1113                -name $1 -print )
1114 endef
1115
1116 define all-sources
1117         $(call find-sources,'*.[chS]')
1118 endef
1119 define all-kconfigs
1120         $(call find-sources,'Kconfig*')
1121 endef
1122 define all-defconfigs
1123         $(call find-sources,'defconfig')
1124 endef
1125
1126 define xtags
1127         if $1 --version 2>&1 | grep -iq exuberant; then \
1128             $(all-sources) | xargs $1 -a \
1129                 -I __initdata,__exitdata,__acquires,__releases \
1130                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1131                 --extra=+f --c-kinds=+px \
1132                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1133             $(all-kconfigs) | xargs $1 -a \
1134                 --langdef=kconfig \
1135                 --language-force=kconfig \
1136                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1137             $(all-defconfigs) | xargs -r $1 -a \
1138                 --langdef=dotconfig \
1139                 --language-force=dotconfig \
1140                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1141         elif $1 --version 2>&1 | grep -iq emacs; then \
1142             $(all-sources) | xargs $1 -a; \
1143             $(all-kconfigs) | xargs $1 -a \
1144                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1145             $(all-defconfigs) | xargs -r $1 -a \
1146                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1147         else \
1148             $(all-sources) | xargs $1 -a; \
1149         fi
1150 endef
1151
1152 quiet_cmd_cscope-file = FILELST cscope.files
1153       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1154
1155 quiet_cmd_cscope = MAKE    cscope.out
1156       cmd_cscope = cscope -b
1157
1158 cscope: FORCE
1159         $(call cmd,cscope-file)
1160         $(call cmd,cscope)
1161
1162 quiet_cmd_TAGS = MAKE   $@
1163 define cmd_TAGS
1164         rm -f $@; \
1165         $(call xtags,etags)
1166 endef
1167
1168 TAGS: FORCE
1169         $(call cmd,TAGS)
1170
1171 quiet_cmd_tags = MAKE   $@
1172 define cmd_tags
1173         rm -f $@; \
1174         $(call xtags,ctags)
1175 endef
1176
1177 tags: FORCE
1178         $(call cmd,tags)
1179
1180
1181 endif #ifeq ($(config-targets),1)
1182 endif #ifeq ($(mixed-targets),1)
1183
1184 # Single targets
1185 # ---------------------------------------------------------------------------
1186 # Single targets are compatible with:
1187 # - build whith mixed source and output
1188 # - build with separate output dir 'make O=...'
1189 # - external modules
1190 #
1191 #  target-dir => where to store outputfile
1192 #  build-dir  => directory in kernel source tree to use
1193
1194 build-dir  = $(patsubst %/,%,$(dir $@))
1195 target-dir = $(dir $@)
1196
1197 %.s: %.c prepare scripts FORCE
1198         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1199 %.i: %.c prepare scripts FORCE
1200         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1201 %.o: %.c prepare scripts FORCE
1202         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1203 %.lst: %.c prepare scripts FORCE
1204         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1205 %.s: %.S prepare scripts FORCE
1206         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1207 %.o: %.S prepare scripts FORCE
1208         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1209 %.symtypes: %.c prepare scripts FORCE
1210         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1211
1212 # Modules
1213 / %/: prepare scripts FORCE
1214         $(Q)$(MAKE) $(build)=$(build-dir)
1215 %.ko: prepare scripts FORCE
1216         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1217         $(build)=$(build-dir) $(@:.ko=.o)
1218         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1219
1220 # FIXME Should go into a make.lib or something
1221 # ===========================================================================
1222
1223 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1224       cmd_rmdirs = rm -rf $(rm-dirs)
1225
1226 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1227       cmd_rmfiles = rm -f $(rm-files)
1228
1229
1230 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1231           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1232           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1233
1234 quiet_cmd_as_o_S = AS      $@
1235 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1236
1237 # read all saved command lines
1238
1239 targets := $(wildcard $(sort $(targets)))
1240 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1241
1242 ifneq ($(cmd_files),)
1243   $(cmd_files): ;       # Do not try to update included dependency files
1244   include $(cmd_files)
1245 endif
1246
1247 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1248 # Usage:
1249 # $(Q)$(MAKE) $(clean)=dir
1250 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1251
1252 endif   # skip-makefile
1253
1254 PHONY += FORCE
1255 FORCE:
1256
1257 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1258 Makefile: ;
1259
1260 # Declare the contents of the .PHONY variable as phony.  We keep that
1261 # information in a variable se we can use it in if_changed and friends.
1262 .PHONY: $(PHONY)
1263
1264 #
1265 # sanity checks for check default environemnt
1266 #
1267 ifdef CONFIG_DEFAULT_ENVIRONMENT
1268
1269 ifeq ($(CONFIG_DEFAULT_ENVIRONMENT_PATH),"")
1270 $(error default environment path empty))
1271 endif
1272
1273 saved-env_path := $(CONFIG_DEFAULT_ENVIRONMENT_PATH)
1274 CONFIG_DEFAULT_ENVIRONMENT_PATH := $(shell cd $(if $(filter /%,$(CONFIG_DEFAULT_ENVIRONMENT_PATH)),,$(srctree)/)$(CONFIG_DEFAULT_ENVIRONMENT_PATH) && /bin/pwd)
1275 $(if $(CONFIG_DEFAULT_ENVIRONMENT_PATH),, \
1276         $(error default environment path $(saved-env_path) does not exist))
1277
1278 endif # ifdef CONFIG_DEFAULT_ENVIRONMENT